Question

3x power 2 - 4y power 2 from 15 xy - 3 x power 2 -4 power 2

Answer 1

15xy−3x2−42−(3x2+4y2)

Distribute the Negative Sign:

=15xy−3x2−42+−1(3x2+4y2)

=15xy+−3x2+−16+−1(3x2)+−1(4y2)

=15xy+−3x2+−16+−3x2+−4y2

Combine Like Terms:

=15xy+−3x2+−16+−3x2+−4y2

=(−3x2+−3x2)+(15xy)+(−4y2)+(−16)

=−6x2+15xy+−4y2+−16